Just pick any, all of them are pretty secure ;-) Whirlpool is slower comparing to sha-512, so in theory bruteforce attack should take longer. So maybe it is more secure. But bruteforce is ineffective on either of them, at least today. Same goes with encryption
algorithm, combination of aes-twofish-serpent is safest (because it is slowest) and if one will be broken, you still have the other 2 layers. Note, that the adversary will always try to retrieve your password by other means (keylogger, hidden camera, drone,
satellite, etc...)

Just pick any, all of them are pretty secure ;-) Whirlpool is slower comparing to sha-512, so in theory bruteforce attack should take longer. So maybe it is more secure. But bruteforce is ineffective on either of them, at least today. Same goes
with encryption algorithm, combination of aes-twofish-serpent is safest (because it is slowest) and if one will be broken, you still have the other 2 layers. Note, that the adversary will always try to retrieve your password by other means (keylogger, hidden
camera, drone, satellite, etc...)

Sorry but in my pc it appears that whirpool is to fast that sha-512; what does that mean?